Method of making packing-rings.



J. B. WENZEL.

METHOD OF MAKING PACKING RINGS.-

APPLICATION FILED JAN.9, 1914.

Patented Dec. 28, 191.5.

owe/EX JACOB B. WENZEL,

OF CHICAGO,

ILLINOIS.

METHOD OF MAKING PACKING-RINGS.

specification of Letters Patent.

Patented Dec. 2%, 1915.

Application filed January 9, 1914. Serial No. 811,257.

To all whom it may concern Be it known that I, JACOB B. WENZEL, asubject of Hungary, residing at Chicago, in the county of Cook'and Stateof Illinois, have invented certain Improvements in Methods of MakingPacking-Rings, of which the following is a specification.

The objects of this invention are to provide an improved packing ringwhich shall have uniform tension for its entire circumference; toproduce such tension by hammering or distorting the material of whichthe ring is composed, and afterward grinding or shaping the ring; tothus enable the hammering to be easily and conveniently done, withoutthe marks of it being apparent in the finished ring; to provide ahammered ring which can be readily and cheaply manufactured, and toobtain other advantages and results as may be brought out in thefollowing description.

Referring to the accompanying drawings, in which like numerals ofreference indicate the same parts throughout the several figures, Figure1 is a view of a ring blank which has been sawed or cut; Fig. 2 is across-section of the same on line A-A, looking in the directionindicated by the arrow; Fig. 3 shows the ring after it has beenhammered; Fig. 4 is a cross-section of the same on line BB looking inthe direction indicated by the arrow; Fig. 5 is a view of the ringcompleted by grinding, and Fig. 6 is a cross-section of the same on lineC, looking in the direction indicated by the arrow.

In the specific embodiment of the invention shown in said drawings. 1indicates a plain circular ring 'of any suitable material, preferablymetal, which is of substantially uniform cross-section at all points,preferably rectangular, and sawed or parted as at 2 to permit theexpansion and contraction incident to use of the finished ring. Thematerial of which the split ring thus described is composed is distortedor its density variably changed at different points of the ring so as togive it such a uniform tensicn that if its size is changed it willremain circular and the tendency to return to its normal size will beuniform all around the ring. In carrying out my present invention, thisdistortion or modified density is secured by compressing the material ormetal of the ring at one or both of the opposite end edges 3, 3 of thering which lie in substantially parallel planes. This compressing may bedone in any suitable. manner, such as by rolls or dies, or by simplyhammering the said surfaces 3, 3 either by hand or by machinery. Thecompression must be greatest at that point of the ring directly oppositeits split 2 and from that point decreases toward each end of the ring;furthermore, the compression is preferably not uniform transversely ofthe ring in radial direction, but is greatest next to the inner curvedsurface 4 of the ring and diminishes radially outward toward the outercurved surface 5. This is all shown and illustrated in Figs. 3 and 4 ofthe drawings, where 6, 6 indicate the hammered portions of the oppositeend edges of the ring, each of said hammerings being most pronouncedopposite the split 2 and gradually diminishing in both directions towardthe ends of the ring, the hammered surfaces being beveled or inclinedinwardly toward the center of the ring.

While I have thus described in detail one way of compressing the ring,which I have found to give good results in practice, this is merely forillustration, and I do not wish to be understood as restricting myselfthereto. The compression can be effected or accomplished in anydesirable manner suggesting itself to those skilled in analogous arts,and by the use of proper machinery can be done with great rapidity andcheapness and yet with great accuracy and uniformity. After the ring hasbeen compressed so as to distort the metal forming said ring, or changeits density crosssecticnally of the ring at different points of itscircumference, the ring is simply ground or otherwise shaped so that itscross-section is again rectangular or the opposite end edges restored toparallel relation. so that the ring will make a good joint. This is ofcourse done by removing all the metal projccting beyond a planeperpendicular to the axis of the ring through the point of greatestcompression. so that the width of the completed ring 7 as shown in Figs.5 and 6 is that of the narrowest portion of the inner surface of thecompressed ring 8 as shown in Figs. 3 and 4. The completed ring.therefore, while of rectangular cross-section, as was the blank 1started with, is of somewhat less width than said blank, as shown in thedrawings. The loss of metal is however slight, and the ease and rapidityof manufacture is great.

It will be understood that in hammering th ring blanks to compress themetal and secure uniform tension, a plurality of blows may be struck,either of the same force and varying in distance apart circumferentiallyof the ring, or of force varying circumferentially of the ring anddelivered at equal distance apart.

By my improved method of manufacture, a packing ring is obtained whichis of uniform tension and at the same time has smooth outer surfacesunbroken by any indentations or scorings.

Having thus described the invention, what I claim is,

1. A method of making packing rings, consisting in compressing anannular blank in varying degree circumferentially, and grinding orotherwise removing material from a surface of the ring to which pressurewas applied until the ring is of the desired cross-section.

2. A method of making packing rings, consisting in compressing in adirection parallel to its axis an annular blank of substantially uniformcross-section in varying degree circumferentially, and grinding orotherwise removing material from the ring to bring its end-edges intoparallel planes.

3. A method of making packing rings,

consisting in compressing an annular blank in a direction parallel toits axis and in varying degree circumferentially, and grinding orotherwise removing material from a surface of the ring to which pressurewas applied until the ring is of the desired crosssection. I a

4. A method of making packing rings, consisting in compressing anannular blank in a direction parallel to its axis, said compressionvarying both transversely of the ring on radial lines and alsocircumferenti'ally of the ring, and'grinding or otherwise removingmaterial from the ring to make it substantially uniform incross-section.

5. A method of making packing rings, consisting in compressing anannular blank in a direction parallel to its axis in varying degree bothtransversely of the ring on radial lines and circumferentially of thering, and grinding or otherwise removing material from the ring to makeits end edges substantially parallel to each other.

JACOB B. WENZEL.

